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From: Tamas Blummer <tamas@bitsofproof.com>
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Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] New BIP32 structure
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I think not all alts (will) have magic numbers, at least not those =
defined e.g. with colored coins on top of an other chain.
Also note that the index should have MSB cleared as it would otherwise =
indicate private derivation.=20
Regards,
Tamas Blummer
http://bitsofproof.com
On 27.03.2014, at 16:57, Allen Piscitello <allen.piscitello@gmail.com> =
wrote:
> Don't most of these coins have a magic number already assigned that is =
unique? (0xD9B4BEF9 for Bitcoin, 0x0709110B for Testnet, FBC0XB6DB for =
Litecoin, etc...). This seems like a good candidate for identifying =
coins, and also supports Testnet cases well. Maybe there are some alts =
without such a magic number that might prevent that?
>=20
> -Allen
>=20
>=20
> On Thu, Mar 27, 2014 at 10:43 AM, Jeff Garzik <jgarzik@bitpay.com> =
wrote:
> On Thu, Mar 27, 2014 at 3:09 AM, Tamas Blummer <tamas@bitsofproof.com> =
wrote:
> > A notable suggestion was to instead of building a directory of magic =
numbers
> > (like 0 for Bitcoin, 1 for Litecoin etc) use a hash of the word =
"Bitcoin",
> > "Litecoin", "Dogecoin", so collosion is unlikely and
> > cetral directory is not needed.
>=20
> +1 good idea
>=20
> --
> Jeff Garzik
> Bitcoin core developer and open source evangelist
> BitPay, Inc. https://bitpay.com/
>=20
> =
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> Bitcoin-development@lists.sourceforge.net
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>=20
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Diso-8859-1"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; =
"><div>I think not all alts (will) have magic numbers, at least not =
those defined e.g. with colored coins on top of an other =
chain.</div><div><br></div><div>Also note that the index should have MSB =
cleared as it would otherwise indicate private =
derivation. </div><div><br></div><div><div><div =
apple-content-edited=3D"true"><span style=3D"color: rgb(0, 0, 0); =
font-family: Helvetica; font-size: medium; font-style: normal; =
font-variant: normal; font-weight: normal; letter-spacing: normal; =
line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: =
0px; text-transform: none; white-space: normal; widows: 2; word-spacing: =
0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; =
display: inline !important; float: none; ">Regards,</span><br =
style=3D"color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: 2; text-align: =
-webkit-auto; text-indent: 0px; text-transform: none; white-space: =
normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; =
-webkit-text-stroke-width: 0px; "><br style=3D"color: rgb(0, 0, 0); =
font-family: Helvetica; font-size: medium; font-style: normal; =
font-variant: normal; font-weight: normal; letter-spacing: normal; =
line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: =
0px; text-transform: none; white-space: normal; widows: 2; word-spacing: =
0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; =
"><span style=3D"color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
medium; font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: 2; text-align: =
-webkit-auto; text-indent: 0px; text-transform: none; white-space: =
normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; =
-webkit-text-stroke-width: 0px; display: inline !important; float: none; =
">Tamas Blummer</span><br style=3D"color: rgb(0, 0, 0); font-family: =
Helvetica; font-size: medium; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: =
none; white-space: normal; widows: 2; word-spacing: 0px; =
-webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><span =
style=3D"color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: 2; text-align: =
-webkit-auto; text-indent: 0px; text-transform: none; white-space: =
normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; =
-webkit-text-stroke-width: 0px; display: inline !important; float: none; =
"><a href=3D"http://bitsofproof.com">http://bitsofproof.com</a></span>
</div>
<br><div><div>On 27.03.2014, at 16:57, Allen Piscitello <<a =
href=3D"mailto:allen.piscitello@gmail.com">allen.piscitello@gmail.com</a>&=
gt; wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><div dir=3D"ltr"><span =
style=3D"background-color:rgb(255,255,255)">Don't most of these coins =
have a magic number already assigned that is unique? (<span =
style=3D"font-family: sans-serif; font-size: 13px; line-height: =
19.200000762939453px; ">0xD9B4BEF9</span><span style=3D"font-family: =
sans-serif; font-size: 13px; line-height: 19.200000762939453px; =
"> for Bitcoin, </span><span style=3D"font-family: sans-serif; =
font-size: 13px; line-height: 19.200000762939453px; ">0x0709110B for =
Testnet, </span><span style=3D"font-family: sans-serif; font-size: =
13px; line-height: 19.200000762939453px; ">FBC0XB6DB for Litecoin, =
etc...). This seems like a good candidate for identifying coins, =
and also supports Testnet cases well. Maybe there are some alts =
without such a magic number that might prevent that?</span></span><div>
<span style=3D"font-family: sans-serif; font-size: 13px; line-height: =
19.200000762939453px; background-color: rgb(255, 255, 255); =
"><br></span></div><div><span style=3D"font-family: sans-serif; =
font-size: 13px; line-height: 19.200000762939453px; background-color: =
rgb(255, 255, 255); ">-Allen</span></div>
</div><div class=3D"gmail_extra"><br><br><div class=3D"gmail_quote">On =
Thu, Mar 27, 2014 at 10:43 AM, Jeff Garzik <span dir=3D"ltr"><<a =
href=3D"mailto:jgarzik@bitpay.com" =
target=3D"_blank">jgarzik@bitpay.com</a>></span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex"><div class=3D"">On =
Thu, Mar 27, 2014 at 3:09 AM, Tamas Blummer <<a =
href=3D"mailto:tamas@bitsofproof.com">tamas@bitsofproof.com</a>> =
wrote:<br>
</div><div class=3D"">> A notable suggestion was to instead of =
building a directory of magic numbers<br>
> (like 0 for Bitcoin, 1 for Litecoin etc) use a hash of the word =
"Bitcoin",<br>
> "Litecoin", "Dogecoin", so collosion is unlikely and<br>
> cetral directory is not needed.<br>
<br>
</div>+1 good idea<br>
<span class=3D"HOEnZb"><font color=3D"#888888"><br>
--<br>
Jeff Garzik<br>
Bitcoin core developer and open source evangelist<br>
BitPay, Inc. <a href=3D"https://bitpay.com/" =
target=3D"_blank">https://bitpay.com/</a><br>
</font></span><div class=3D"HOEnZb"><div class=3D"h5"><br>
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